Dishwashing apparatus



July 9, 1929. J. J. KEHOE, JR

DISHWASHING APPARATUS 3 Sheets-Sheet Filed Jan. 25, 1927 r E w 6' 25 AvaJuly 9,1929. J KEHOE, JR 1.720.332

DI SHWASHING APPARATUS Filed Jan. 25, 192'? 3 Sheets-Sheet 2 July 9,1929.

J. J. KEHOE, JR

DISHWASHING APPARATUS Filed Jan. 25, 1927 3 Sheets-Sheet 3 Patented July9, 1929.

JAMES JOSEPH KEEOE, JR, 013 TORONTO, ONTARIO, CANADA.

DISHWASHING APPARATUS.

Application filed January 25, 1927. Serial No. 163,510.

My invention relates to improvements in a dish washing apparatus bywhich the positions of the water streams or sprays are definitely andautomatically changed relatively to its contents during its operation.

Various modifications of this water system are possible, within thescope of the invention, and while I have hereinafter described vandshown in the accompanying drawings a preferred embodiment of theinvention, it is not intended that it should be confined to thisparticular construction which comprises a plurality of travelling pipes,each of which 1s fitted to a water chest aving a flexible connectionwith a water supply, and a valve control for the flow of water, from thewater supply .to the pipes.

For an understanding of the invention reference is to be had to thefollowing description and to the accompanying drawings,

in which; I

I Fig. 1 is a: fragmentary sectional elevation of a dish washingapparatus constructed according to this invention, b

Fig. 2 is a sect'onal elevation on the line 2 2, Fig. 1,

Fig. 3 is a sectional plan'view of the water system shown in Figs. 1 and2,

Fig. 4 is a vertical sectional view on the line 4-4, Fig. 3,

Fig. 5 is a vertical sectional-view on the line 5-5, Fig. 3, and

Fig. 6 is a detail View of a pivoted yoke.

Like numerals of reference refer to like parts throughout thespecification and drawings.

The housing 1, which may be of any convenient shape and size, dolesnotconstitute any part of the resent invention and it is only referred toor the purpose of explaining the novel features of the apparatus.Journalled at or nearthe'bottom 2 of the housing is a rotatable shaft3', driven preferably by an electric motor, and, provided within thehousing with right and left screw threads 5 and 6 respectively andstopping shoulders 7 and8 at the ends of the threads. Movable axially ofthe shaft 3 is a carriage 9 having a bore 10 through which the shaft isentered and a yoke 11 within the bore 10 for engaging the threads of theshaft and causing the travel of the carriage. In order that the movementof the carriage may be automatically reversed at each limit of itstravel, the yoke 11 is provided, intermediate its ends, with a pin orarbor 12 swivelled or stopping shoulders.

pivoted in a socket 13 extending vertically from the bore 10. Theengagement of the screw threads 5 or 6 with the yoke 11 causes thetravel of the carriage 9 alternately tothe right or left of the housing,and at the limlt of travel, in each direction, the yoke 11 alternatelycomes into contact with the Each shoulder causes it to oscillate andtransfer from the screw thread, which has moved it to one'limit oftravel, into the screw thread which will move it to the opposite limit,thus automatically reversing the immediate preceding direction of thecarriage.

Mounted on and movable with the carriage 9 is a water chest14 having aninlet 15 connected by an extensible-flexible pipe 16 with the watersupply pipe 17. This extensible-flexible pipe, as shown in Fig. 2,comprises two telescopic sections connected supply 17 by universalcouplings 18. The to escopic sections and the universal couplings permitof the automatic extension and contraction of thepipe and its continuouschange of position during the travel of the carriage back and forth onthe shaft. Leading from the water chest are three outlet ports 19, 20and 21, arranged around a vertical bearing 22 in which is journalled anintermittently rotatable valve stem or post 23. These ports 19, 20 and21 are evenly spaced from each other and from the axis of the bearing22, and on the valve stem or post 23 is a rotary valve 24 having asingle. port 25 which, during the rotation of the respectively with theinlet 15 and'the water valve 24, comes successively opposite theports19, 20 and 21, and opens a waterway from the inlet port 15 to the port19, 20 or 21, with which it is for the time being opposite, the valve atthe same time closing the other two ports.

The valve stem 23 projects above the top of the water chest and isprovided with three arms 26, 27 and 28 of corresponding length, evenlyspaced from each other, and arranged in the form of a crows foot, asshown in Fig. 3. The forward side of each arm is straight and thereverse side is conve'xed and at the base of the forward side of one armand the reverse side of the next adjacent arm is a concave curve whichblends these two sides into one another. At one limit of the travel ofthe carriage is a horizontal arm 29 and pivoted to the arm 29 is a pawl30. During the travel of the carriage and water chest in the directionof the arm 29 the pawl 30 engages the forward side of the arm 26 and bysuch engagement rotates the valve stem 23 and valve 24 one hundred andtwenty degrees to bring the port 25 opposite the port 19. The carriageand valve chest continue their travel to their limit of movement untilthe yoke 11 comes into contact with the stopping shoulder 7, which,oscillating the yoke, transfers 1t from the screw threads 6 to the screwthreads 5., The carriage then travels to the opposite end of the shaftand the yoke 11, when it engages the stopping shoulder 8, is transferredfrom the threads 5 to the threads 6, which cause the carriage to travelagain in the direction of the horizontal arm 29. 'The pawl 30 thenengages the forward face of the next arm 28 and again rotates the valve24 one hundred and twenty degrees to bring the valve port 25 oppositethe port 20, and on the completion of the next course of travel of thecarria e the pawl engages the forward face of the arm 28 and rotates thevalve 24to bring the valve port 25 opposite the port 21. Fitted to theports 19, 20 and 21 are water pipes 31, 32 and 33, each provided withoutlets 34 which may be equipped with sprayers or other waterdischarging devices. The water pipe 31 as shown in Fig. 2 extendshorizontally from the water chest and is located at or near the bottomof the housing. The water pipes 32 and 33 are vertical and each has ahorizontal arm at its u per end. arm 32 of the plpe 32 extendstransversely across and about midway between the top and bottom of thathousing and the horizontal arm 33 of the pipe 33 extends transverselyacross the housing near the top The water pipes 31, 32 and 33 travelwith the Water chest and carriage back and forth lengthwise of thehousing and change the position of the water streams or spraysrelatively to the contents of the apparatus continuouslyrduring theirtravelling movements,

and by doing so spread the discharge over the entire surfaces of thecontents of the apparatus. By limltlng the flow to one pipe at a timethe maximum-pressure at the inlet of the water chest is obtained throughthe pipe and a forceful discharge through the outlets 34 which is'utilized for driving the water streams or spray against the articlesbeing washed.

To prevent the carriage, water chest and pipesupsetting while stationaryor in motion, a track 40 is supported by hangers 41 5 within the housingin parallel relation to the shaft. This track, shown in Fig. 2, islocated at or near the top of the housing in the vicinity of its front42 and above and clear of the doorway 43, so that it will not impede theentry of the articles into, or their withdrawl from, the apparatus. Ex-

The horizontal tending from the end of the horizontal arm 33 is an arbor44 on which is mounted a grooved wheel 45. The flanges of this wheeloverlap the tread of the track and counteract the axial thrust of thearm 31 resulting from the pulsations or pressure of the water flowingfrom the water chest into the pipes, and also counteract the upsettingmovement or tendency to upset, of the carriage, water chest and pipeHaving thus fully described my invention what I claim as new and desireto secure by Letters Patent is 1. A dishwashing apparatus comprising ahousing, a plurality of reciproeatory pipes having outlets for thedischarge of water within the housing, means for causing thereciprocation of the pipes and a change of location of the outlets withrelation to the contents of the apparatus, means for supplying water tosaid pipes and an intermittently operable valve for automaticallyestablishing a flow, from the water supply through each of the pipes insuccession during their reciprocation.

2. A dishwashing apparatus comprising a housing, a reciproeatory waterchest within the housing provided with piped outlets for the dischargeof the water, means for causing the reciprocation of the water chest anda change of location of the piped outlets with relation to the contentsof the apparatus, means for supplying water to said chest and anintermittently rotatable valve for automatically establishing a flowfrom the water chest through each piped outlet in succession.

3. A dishwashing apparatus comprising a housing, a reciproeatory waterchest within the housing provided with piped outlets for thedischarge ofthe water, means for-causing the reciprocation of the water chestand achange of location of the piped outlets with relation to the contents ofthe apparatus, means for supplying water to said chest an intermittentlyrotatable valve for automatically establishing a flow from the waterchest through each piped outlet in succession, and means for causing therotation of the valve during .the reciprocations of the water chest.

4. A dish washing apparatus comprising a housing, a rotatable shafthaving right and left hand threads journalled within the housing a waterchest, a carriage for the water chest movable axially on the shaft, saidwater chest having an inlet port and a pluleft hand threads journalledwithin the housing, a water chest, a carriage for the water chestmovable axially on the shaft, said water chest having an inlet port anda-plu- 5 rality of outlet ports, an intermittently rotatable valvehaving a port which establishes a circulation from the waterchestthrough the outlet ports in succession, a water pipe for eachoutlet port having outlets for the 1 dlscharge of the water streams, avalve stem for the valve, a plurality of arms extending from the valvestem beyond the Water chest, and a pivoted pawl engaging each arm insuccession when the carriage reaches its limit of travel for the partialrotation of the valve.

Dated at the city of Toronto, in the county of York, and Province ofOntario, Dominion of Canada, this 19th day of October, 1926.

JAMES JOSEPH KEHOE, J n.

